Methods for producing polycarbonate copolymer and polysiloxane compound, polycarbonate copolymer, polysiloxane compound, composition, and molded body

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12240978
APP PUB NO 20220033655A1
SERIAL NO

17492937

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)′ to (1-4)′ and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • MITSUBISHI GAS CHEMICAL COMPANY INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akimoto, Hisato Tokyo, JP 7 0
Kamatani, Kohei Tokyo, JP 9 5
Tomita, Keisuke Tokyo, JP 16 24
Uera, Kazuyoshi Tokyo, JP 20 30

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Sep 4, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Sep 4, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Sep 4, 2036
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00